HC705P6AGRSSLASHD datasheet(32/134 Pages) NXP

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Operating Modes

General Release Specification

MC68HC705P6A — Rev. 1.0

Operating Modes

3.3 User Mode

The user mode allows the MCU to function as a self-contained

microcontroller, with maximum use of the pins for on-chip peripheral

functions. All address and data activity occurs within the MCU and are

not available externally. User mode is entered on the rising edge of

RESET if the IRQ/VPP pin is within the normal operating voltage range.

The pinout for the user mode is shown in Figure 3-1.

Figure 3-1. User Mode Pinout

In the user mode, there is an 8-bit I/O port, a second 8-bit I/O port shared

with the A/D subsystem, one 3-bit I/O port shared with the SIOP, and a

3-bit port shared with the 16-bit timer subsystem, which includes one

general-purpose I/O pin.

Table 3-1. Operating Mode Conditions After Reset

RESET Pin

IRQ/VPP

PD7/TCAP

Mode

VSS to VDD

Single-Chip

VPP

VDD

Bootloader

RESET

IRQ/VPP

PA7

PA6

PA5

PA4

PA3

PA2

PA1

PA0

SDO/PB5

SDI/PB6

SCK/PB7

VSS

VDD

OSC1

OSC2

PD7/TCAP

TCMP

PD5

PC0

PC1

PC2

PC3/AD3

PC4/AD2

PC5/AD1

PC6/AD0

PC7/VREFH

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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